Swaygo Gear Shields are designed and engineered to add two layers of protection to the Suunto Tandem, KB-14 compasses and PM-5 clinometers. The die-cut, 30mil Lexan cover will help protect the fragile capsules from bumps and bangs. The clear, adhesive capsule circle will help prevent small cracks and contain fluid leaks. And, the Swaygo Sight Lights, glow-in-the-dark instrument illumination, come pre-attached. Protects and illuminates.